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Expansion of exp(x)/cosh(sinh(x)).
0

%I #17 Apr 01 2017 13:59:48

%S 1,1,0,-2,-4,-4,24,176,272,-1712,-14528,-66912,181312,4737344,

%T 20265088,-53926656,-1771263744,-18559434496,4388386816,1869838374400,

%U 16325400792064,35429689535488,-1796402984175616,-36301265658269696

%N Expansion of exp(x)/cosh(sinh(x)).

%t With[{nn=30},CoefficientList[Series[Exp[x]/Cosh[Sinh[x]],{x,0,nn}], x] Range[0,nn]!] (* _Harvey P. Dale_, Sep 18 2011 *)

%K sign,easy

%O 0,4

%A _R. H. Hardin_

%E Extended with signs by _Olivier GĂ©rard_, Mar 15 1997